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Plant mediated green biosynthesis of silver nanoparticles using Vitex negundo L. extract
Mohsen Zargar,Kamyar Shameli,Gholam Reza Najafi,Farah Farahani 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
In the present study silver nanoparticles (Ag-NPs) were synthesized from aqueous silver nitrate througha biosynthetic route using water extract of Vitex negundo L. extract which acted as a reductant andstabilizer agents, simultaneously. Formations of Ag/V. negundo were determined by UV–vis spectroscopywhere surface plasmon absorption maxima can be observed at 423–432 nm. The XRD analysis showsthat the Ag-NPs are of face centered cubic structure. TEM images show the well dispersed of Ag-NPs withaverage particle size less than 20 nm. The FT-IR spectrum indicates the presence of V. negundo in cappingwith silver nanoparticles.
Mahboobeh Eili,Kamyar Shameli,Nor Azowa Ibrahim,Mansor Bin Ahmad,Wan Md Zin Wan Yunus 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.22 No.-
A comparison has been made of the intercalation capacity of the stearate anions into the two differentanionic clays: magnesium aluminumlayered double hydroxide (Mg3Al LDH) and zinc aluminum layereddouble hydroxide (Zn3Al LDH). The anionic clays Mg3Al LDH and Zn3Al LDH were firstly prepared by coprecipitationmethod from nitrate salts solution and then modified by stearate anions through an ionexchange reaction. The properties, morphologies and ion exchange ability of these two clays have beenstudied by XRD, TGA, SEM, TEM and CHNS that show the ability of Zn3Al LDH to capture stearate anions isgreater than Mg3Al LDH.
Parvaneh Shabanzadeh,Rubiyah Yusof,Kamyar Shameli 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.24 No.-
In this study, artificial neural network (ANN) was used to develop an approach for evaluation of silver nanoparticles (Ag–NPs) size in the bionanocomposites substrate. A multi-layer feed forward ANN was applied to correlate the output as size of Ag–NPs, with four inputs include of AgNO3 concentration, temperature of reaction, weight percentage of starch, and MMT amount. The results of proposed methodology were compared for its predictive capabilities in terms of coefficient determination (R2) and mean square error (MSE) based on the validation data set. The model finding revealed that AgNO3 concentration content has significant effect on size of Ag–NPs.
Green synthesis of silver nanoparticles using plant extracts
Mansour Ghaffari-Moghaddam,Robabeh Hadi-Dabanlou,Mostafa Khajeh,Mansoureh Rakhshanipour,Kamyar Shameli 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.4
The strategy for design of new nanometals was developed due to their wide applications in many fields. One of the most important nanometals is silver nanoparticles (AgNPs) because of their extensive applications in biotechnologyand biomedical fields. AgNPs were usually synthesized by using chemical and physical methods. In thechemical methods, various toxic chemicals are used, which are harmful to the health of living organisms. Therefore,the AgNPs were synthesized by using biological methods based on green chemistry for reducing the toxic chemicals. There are various resources for green synthesis of AgNPs, such as bacteria, fungi, enzyme and plant extracts. The greensynthesis of AgNPs involves three main steps: the selection of the solvent medium, the selection of environmentallyreducing agents, and the selection of non-toxic substances for the stability of AgNPs. The biosynthesis of AgNPs usingplant extracts is more favorable than other biological methods because of removing the elaborate process of maintainingcell cultures. It can be also suitably scaled up for large scale production of AgNPs. This review focuses on green synthesisof AgNPs using various plant extracts.